11/30/94

                            Format of the TDL Dictionary

The TDL station dictionary is in 80-character card image format.  The format is:

(A4,1X,5A4,3X,3A1,1X,I5,A1,I5,2X,A1,I2,1X,I2,1X,A1,I3,1X,I2,1X,I1,1X,I1,1X,I5,1X,A1)

TDL Card
Columns                         Desired Information

 1-4				Station call letters.

 6-25                           Station name.  Note, columns 24 and 25 contain the state
				orcountry abbreviation.

   29                           H-denotes stations with observed data in TDL's hourlyarchive
				(all stations archived should be marked with H)

   30                           F-denotes stations for which a FOUS12 or similar
				forecastmessage is generated.

   31                           S-denotes specialized stations (marine, agriculturalweather, etc)
				in TDL's MOSMAT and MOSBAT files.

33-37				Block/station number

   38                           C-denotes stations whose temperatures have been convertedfrom
				0C to 0F.

39-43				Station elevation in whole feet.

   46				N or S for north or south latitude.

47-48				Station latitude in whole degrees.

50-51				Minutes associated with station latitude.

   53				W or E for west or east longitude.

54-56				Station longitude in whole degrees.

58-59				Minutes associated with station longitude.

   61                           Area code:  1=conterminous United States and Bermuda;2=Alaska
				and Canada; 3=Hawaii and Pacific Islands;4=Caribbean Islands;
				5=Mexico, Central, and South America;and 6=rest of the world.

   63                           Type of station. 0 or blank=manual, precipitation
				reported;1=semiautomated, precipitation reported;
				2=manual,precipitation not reported; 3=automated,
				precipitation notreported; 4=automated, AWOS or ASOS.
TDL Card
Columns                         Desired Information
	
65-69				WBAN number.

   71                           Station status.  Blank=active station; O=station that has
				closed or changed its call letters.  (Note, if the call
				letters were changed, the new stations may continue to use
				the old WBAN number.)